Quakeproof anchor bolt structure of bridge

Abstract

The utility model discloses a quakeproof anchor bolt structure of a bridge, which comprises an anchor bolt connected on a plate girder, the upper part of the anchor bolt is connected with a steel sleeve, the quakeproof anchor bolt structure is characterized in that a pier is also provided with a reserved pouring hole, after the plate girder is installed in place, the lower part of the anchor bolt extends into the reserved pouring hole, and the steel sleeve is connected with the steel sleeve. The utility model solves the problems that the plate girder cannot be installed in place and can only be installed after the anchor bolt reinforcing steel bars are cut due to the fact that the anchor bolt reinforcing steel bars are not accurately embedded or the anchor bolt holes are not accurately reserved in the plate girder when the existing plate girder is installed, so that the plate girder cannot be installed in place, and the plate girder cannot be installed in place due to the fact that the anchor bolt reinforcing steel bars are not accurately embedded or the anchor bolt holes are not accurately reserved in the plate girder. The reserved pouring hole is formed in the bridge pier, the installation space of the lower portion of the anchor bolt is enlarged, the lower end of the anchor bolt extends into the reserved pouring hole, and installation of the plate girder is not affected by the anchor bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge anchor bolts, in particular to a seismic-proof anchor bolt structure of a bridge. Background Art

[0002] Bridges need to be equipped with earthquake-proof anchor bolts at abutments and piers. The conventional practice is to embed single (double) anchor bolt steel bars in the pier caps, reserve anchor bolt holes when the slab beams are prefabricated in the factory, and then install them on site. However, in actual situations, there are problems such as inaccurate embedding of anchor bolt steel bars or inaccurate reserved anchor bolt holes in the slab beams, which results in the anchor bolt steel bars not being able to accurately pass through the reserved holes in the slab beams when the slab beams are hoisted into place. Often, the anchor bolt steel bars are cut off at the construction site before the slab beams can be installed, resulting in the lack of earthquake-proof anchor bolts in the earthquake-resistant design of the bridge, which poses a major safety hazard. Utility Model Content

[0003] The utility model aims to provide a seismic anchor bolt structure for a bridge, by opening a reserved casting hole on the pier to increase the installation space at the bottom of the anchor bolt, and extending the lower end of the anchor bolt into the reserved casting hole so that the installation of the plate beam is not affected by the anchor bolt.

[0004] The utility model provides the following technical solutions: an anti-seismic anchor bolt structure of a bridge, comprising an anchor bolt connected to a plate beam, wherein the upper portion of the anchor bolt is connected to a steel casing, and a reserved casting hole is also opened on the pier. After the plate beam is installed in place, the lower portion of the anchor bolt extends into the reserved casting hole, and concrete is poured into the reserved casting hole to fix the anchor bolt in the pier. A steel protrusion is formed on the lower portion of the anchor bolt, and the steel protrusion is also located in the reserved casting hole. The steel protrusion is a circular ring, which protrudes outward by 2 mm on one side, thereby enhancing the connection strength between the anchor bolt and the concrete.

[0005] According to the above technical solution, the cross section of the reserved pouring hole is an inverted trapezoid with a small upper opening and a large lower opening.

[0006] According to the above technical solution, reinforcing ribs are arranged around the outer side of the anchor bolt, the reinforcing ribs are connected to the outer side of the steel casing, the reinforcing ribs are located in the reserved casting holes, and the reinforcing ribs are distributed in a cone shape, thereby enhancing the seismic resistance of the anchor bolt and the connection strength between the anchor bolt and the bridge pier.

[0007] According to the above technical solution, the concrete is C40 slightly expanded fine stone concrete, which ensures the connection strength between the anchor bolts and the bridge piers after pouring.

[0008] According to the above technical solution, the steel casing is embedded in the plate beam or between the hollow slabs to limit the plate beam or hollow slab and improve its seismic performance.

[0009] According to the above technical solution, the anchor bolts are made of HRB400 or HRB500 steel bars with a diameter of φ25 / 28, thereby enhancing the strength of the anchor bolts themselves.

[0010] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0011] (1) By opening reserved casting holes on the piers, the installation space for anchor bolts is increased, and the lower ends of the anchor bolts are extended into the reserved casting holes, so that the installation of the slab beam is no longer affected by the reserved holes for anchor bolts;

[0012] (2) At the same time, reinforcing ribs and steel protrusions are set on the anchor bolts in the reserved casting holes to enhance the connection strength between the anchor bolts and the bridge piers after casting, while also improving its seismic resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural schematic diagram of the pier facade of the utility model;

[0015] Figure 2 It is a schematic diagram of the pier structure of the utility model;

[0016] In the figure: 1. Bridge pier; 2. Plate beam; 3. Anchor bolt; 4. Steel casing; 5. Steel boss; 6. Reserved casting hole; 7. Reinforcement rib. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Embodiment 1

[0019] See also Figure 1The utility model provides a technical solution: an anti-seismic anchor bolt structure of a bridge, comprising an anchor bolt 3 connected to a plate beam 2, a steel casing 4 connected to the upper part of the anchor bolt 3, a reserved casting hole 6 is also opened on the pier 1 to increase the installation space of the anchor bolt 3, after the plate beam 2 is installed in place, the lower part of the anchor bolt 3 extends into the reserved casting hole 6, and concrete is poured into the reserved casting hole 6 to fix the anchor bolt 3 in the pier 1, thereby enhancing the connection strength between the anchor bolt 3 and the pier 1, and at the same time, after the plate beam 2 is installed in place The lower part of the anchor bolt 3 extends into the reserved casting hole 6. By pouring concrete in the reserved casting hole 6, the anchor bolt 3 is fixed, making the installation of the anchor bolt 3 more convenient and not affected by the accuracy of the reserved hole of the plate beam 2. A steel protrusion 5 is formed on the lower part of the anchor bolt 3, and the steel protrusion 5 is also located in the reserved casting hole 6. The steel protrusion 5 is a circular ring, which protrudes outward by 2mm on one side. The steel protrusions 5 are distributed at intervals in the lower part of the anchor bolt 3, which can increase the grip force and improve the connection strength between the anchor bolt 3 and the poured concrete.

[0020] like Figure 2 As shown, the cross section of the reserved casting hole 6 is an inverted trapezoid with a small upper opening and a large lower opening. The cast concrete is completely formed in the pier 1, further enhancing the connection strength between the anchor bolt 3 and the pier 1.

[0021] The outer side of the anchor bolt 3 is surrounded by a reinforcing rib 7, the diameter of the reinforcing rib 7 is 10 mm, and it is distributed in a cone shape. The reinforcing rib 7 is connected to the outer side of the steel casing 4, and the reinforcing rib 7 is located in the reserved casting hole 6. The reinforcing rib 7 is overall conical and spirally distributed. The reinforcing rib 7 can provide elastic force in a spring-like manner to transmit and attenuate vibrations to achieve a shock-absorbing effect, and can also enhance the connection strength between the anchor bolt 3 and the pier 1.

[0022] The concrete is C40 slightly expanded fine stone concrete, which has high molding strength and can meet the use requirements of bridges.

[0023] The anchor bolt 3 is made of HRB400 or HRB500 steel bar with a diameter of φ25 / 28.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A seismic anchor bolt structure for a bridge, comprising an anchor bolt connected to a plate beam, wherein the upper portion of the anchor bolt is connected to a steel casing, and is characterized in that: The pier is also provided with a reserved casting hole. After the slab beam is installed in place, the lower part of the anchor bolt extends into the reserved casting hole. Concrete is poured in the reserved casting hole to fix the anchor bolt in the pier. A steel protrusion is formed on the lower part of the anchor bolt, and the steel protrusion is also located in the reserved casting hole. The steel protrusion is a circular ring, which protrudes outward by 2mm on one side.

2. The earthquake-proof anchor bolt structure of a bridge according to claim 1, characterized in that: The cross section of the reserved pouring hole is an inverted trapezoid with a small upper opening and a large lower opening.

3. The earthquake-proof anchor bolt structure of a bridge according to claim 1, characterized in that: The outer side of the anchor bolt is surrounded by reinforcing ribs, which are connected to the outer side of the steel casing and are located in the reserved casting hole. The reinforcing ribs are distributed in a cone shape.

4. The earthquake-proof anchor bolt structure of a bridge according to claim 1, characterized in that: The concrete is C40 slightly expanded fine stone concrete.

5. The earthquake-proof anchor bolt structure of a bridge according to claim 1, characterized in that: The steel casing is embedded in the plate beam or between the hollow plates.

6. The earthquake-proof anchor bolt structure of a bridge according to claim 1, characterized in that: The anchor bolts are made of HRB400 or HRB500 steel bars with a diameter of φ25 / 28.

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